I have an new es system that I am testing out for intraday trading only, and I have had several traders that know of my strategy for this with a linear regression line that say I should use a tick chart. I am using a 3 minute chart at this time with a 25 period linear regression line, so I am trying to find out what tick levels that other traders are using for shorter time frame equivalent indications? Any suggestions and opinions good or bad would be appreciated-------------thank you in advance!